<template>
	<view>
    <!-- 搜索框 -->
		<view class="search-box">
		  <uni-search-bar :radius="100" cancelButton="none" @input="input"></uni-search-bar>
		</view>
    <!-- 搜索建议 -->
    <view class="sugg-list" v-if="searchResults.length !== 0">
      <view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
        <view class="goods-name">{{item.goods_name}}</view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    <!-- 搜索历史 -->
    <view class="history-box" v-else>
      <!-- 标题区域 -->
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="clean"></uni-icons>
      </view>
      <!-- 列表项 -->
      <view class="history-list">
        <uni-tag @click="gotoGoodsList(item)" :text="item" v-for="(item,index) in histories" :key="index"></uni-tag>
      </view>
    </view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
        // 定时器
				timer:null,
        // 关键字
        keyword:'',
        // 搜索推荐
        searchResults: [],
        // 搜索历史
        historyList:[]
			};
		},
    onLoad() {
      this.historyList = JSON.parse(uni.getStorageSync('keyword') || '[]')
    },
    methods: {
      // 搜索框输入事件
      input(e) {
        clearTimeout(this.timer)
        this.timer = setTimeout(() => {
          this.keyword = e
          this.getSearchList()
          this.saveSearchHistory()
        },500)
      },
      // 获取搜索建议列表
      async getSearchList() {
        if(this.keyword.trim() === '') {
          this.searchResults = []
          return
        }
        const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.keyword })
        console.log(res)
        if(res.meta.status !== 200) return uni.$showMsg()
        this.searchResults = res.message
      },
      // 点击搜索建议
      gotoDetail(id) {
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id=' + id
        })
      },
      // 添加搜索历史
      saveSearchHistory() {
        // this.historyList.push(this.keyword)
        const set = new Set(this.historyList)
        set.delete(this.keyword)
        set.add(this.keyword)
        this.historyList = Array.from(set)
        uni.setStorageSync('keyword',JSON.stringify(this.historyList))
      },
      // 清空历史记录
      clean() {
        this.historyList = []
        uni.setStorageSync('keyword','[]')
      },
      // 点击推荐列表 查看商品详情
      gotoGoodsList(item) {
        console.log(item)
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query=' + item
        })
      }
    },
    computed: {
      histories() {
        return [...this.historyList].reverse()
      }
    },
	}
</script>

<style lang="scss">
.search-box {
  position: sticky;
  top: 0;
  z-index: 99;
}
.sugg-list {
  padding: 0 5px;

  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    align-items: center;
    justify-content: space-between;

    .goods-name {
      // 文字不允许换行（单行文本）
      white-space: nowrap;
      // 溢出部分隐藏
      overflow: hidden;
      // 文本溢出后，使用 ... 代替
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.history-box {
  padding: 0 5px;
  
  .history-title {
    display: flex;
    justify-content: space-between;
    height: 40px;
    align-items: center;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }
  
  .history-list {
    display: flex;
    flex-wrap: wrap;
    
    .uni-tag {
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
